The recommended operating temperature range for the 1N4728A is -65°C to +175°C, although the datasheet only specifies the electrical characteristics at 25°C.
To ensure the 1N4728A is used within its SOA, you should consider the maximum power dissipation, voltage, and current ratings, as well as the thermal resistance and junction temperature. You can use the datasheet's power derating curve to determine the maximum power dissipation at a given temperature.
The typical dynamic impedance of the 1N4728A is around 10-20 ohms, although this value can vary depending on the operating conditions and frequency. This information is not typically provided in the datasheet, but can be found in application notes or through direct communication with the manufacturer.
While the 1N4728A can be used as a voltage regulator, it is not recommended due to its limited power handling capability and relatively high dynamic impedance. A dedicated voltage regulator IC would be a more suitable choice for most applications.
To calculate the power dissipation of the 1N4728A, you need to know the voltage across the diode and the current through it. The power dissipation can be calculated using the formula P = V x I, where P is the power dissipation, V is the voltage, and I is the current.
1N4728A datasheet
by Diodes Incorporated
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